Heat oil in a skillet over medium heat. Add onion, cumin, oregano, paprika, salt, pepper, and chili powder; saute until onion is translucent, 5 to 7 minutes. Add garlic; cook and stir until fragrant, about 1 minute. Transfer onion mixture to a slow cooker.
Add chicken stock, chicken, beans, corn, beer, and cilantro. Cover and cook on Low for 6 hours or High for 2 hours.